from tkinter import *

root = Tk()

w = Canvas(root,width=200,height=100)
w.pack()

line1 = w.create_line(0,50,200,50,fill='yellow')
line2 = w.create_line(100,0,100,100,fill='red',dash=(4,4))
rect1 = w.create_rectangle(50,25,150,75,fill='blue')

w.coords(line1,0,25,200,25)
w.itemconfig(rect1,fill='red')
w.delete(line2)

Button(root,text='删除全部',command=(lambda x=ALL:w.delete(x))).pack()

mainloop()
